What that spec means is that with two graphics cards, both will run at X16, with three one will run at X16 and the other two at X8, and with four graphics cards all of them will run at X8. I'm not sure why you'd want to run at X8 though when you could be at X16, in any case, the board will automatically run in the most efficient configuration.

What that spec means is that with two graphics cards, both will run at X16, with three one will run at X16 and the other two at X8, and with four graphics cards all of them will run at X8. I'm not sure why you'd want to run at X8 though when you could be at X16, in any case, the board will automatically run in the most efficient configuration.